All servers on the corporate network run Windows Server 2003 and all clients run Windows XP.
You have been asked to install a new application called App1 for the network users. The
application needs two processors and 3GB RAM to run successfully.
To test App1, you assemble a server named ABC-AppSrv with 4GB RAM and two processors and
install Windows 2003 Standard Edition 32-bit on it. You install App1 on the server and install the
client component of the application on 20 client computers.
When you execute the application, you discover that the application is running very slowly on the
20 client computers. When you disconnect some of the client computers, the application runs
faster on the remaining client computers.

How can you improve the performance of App1?

A.
Install the 64-bit version of Windows Server 2003 on ABC-AppSrv.

B.
Use Task Manager to increase the priority of App1 on ABC-AppSrv.

C.
Add more RAM to ABC-AppSrv.

D.
Change the operating system on ABC-AppSrv to Windows Server 2003 Enterprise Edition.

E.
Add the /3GB switch to the boot.ini file.

Explanation:
Although the Windows Server 2003 standard edition supports 4GB of RAM, it
reservers 2GB RAM for the operating system. This leaves only 2 GB RAM for the application.
Because of the insufficient amount of RAM, the application runs slowly.
To correct the problem you need to change modify the boot.ini file by adding the /3GB switch. This
will configure the server to leave 3GB of RAM for the application and use just 1GB of RAM for the
operating system.
Reference: Planning, Implementing, and Maintaining a Microsoft Windows Server 2003 Active
Directory Infrastructure. P. 1:28
Jill Spealman, Kurt Hudson&Melisa Craft, MCSE Self Paced Training Kit.